science

Prashna Tantra

Prashna Tantra is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Prashna Tantra rather than just read about it. In short: Prashna Tantra (IAST: Praśna-tantra) is an Indian text on horary astrology. Authorship The text has been attributed to the 16th century astrologer-astronomer Nilakantha by earlier sources, but later research suggests that the original Prashna-tantra was written by Samara-simha in the 13th century, largely based on Sahl ibn Bishr's 9th century text Kitāb fi l-masa'il wa-l-ahkam.

Key takeaways

Prashna Tantra belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Prashna Tantra to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Prashna Tantra from memory before moving on to harder problems.

Reference excerpt

Prashna Tantra (IAST: Praśna-tantra) is an Indian text on horary astrology.

Authorship The text has been attributed to the 16th century astrologer-astronomer Nilakantha by earlier sources, but later research suggests that the original Prashna-tantra was written by Samara-simha in the 13th century, largely based on Sahl ibn Bishr's 9th century text Kitāb fi l-masa'il wa-l-ahkam. Nilakantha or one of his students may have compiled the hybrid version of Prashna-tantra to complement the two volumes of Nilakantha's Tajika-Nilakanthi, by adding excerpts from other texts to the original work. These other texts include mainly non-Tajika Sanskrit works such as Bhattotpala's Prashna-jnana, Padma-prabha-suri's Bhuvana-dipaka, Narayana-dasa Siddha's Prashna-vaishnava, Prthyu-yashas's Shatpanchashika, Varaha-mihira's Brhadyatra, Ramachandra's Samara-sara, Yaska's Nirukta, Prashna-chintamani, Prashna-dipaka, Prashna-pradipa, Trailokya-prakasha, and Jnana-muktavali, among others.

Contents The text is based on the Tajika system of prognostication. It comprises 430 slokas divided into four chapters, and is written in the usual Sanskrit Sloka – format. Prashna Tantra is divided into four chapters, viz – Prashna Vichara (preliminaries), Bhava Prashna (questions bearing on different houses), Vishesha Prashna (special questions) and Prakirnakadhyaya (concluding remarks). The aspects considered by this work are those of the Tajika system, an aspect by itself has no orb but planets have orbs of operation; Yogas in this system arise on the basis of applying and separating aspects, the closer the yoga (Ithsala etc.,), the more certain will be the results. The rules and methods initiated by this text have found favour with astrologers since the time it was written and came to light around 1580.

Worked examples

Example 1 — a first encounter with Prashna Tantra

Start with the simplest possible case. Write down what Prashna Tantra claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Prashna Tantra before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Prashna Tantra ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Prashna Tantra

In research: Prashna Tantra appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Prashna Tantra in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Prashna Tantra is common in secondary-school and first-year university syllabi. It links to neighbouring topics 13th-century Sanskrit literature, 1580 books, 16th-century Indian books, so understanding it makes those chapters shorter.
In everyday life: Look for Prashna Tantra outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Prashna Tantra in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Prashna Tantra means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Prashna Tantra out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Prashna Tantra in simple terms?

Prashna Tantra (IAST: Praśna-tantra) is an Indian text on horary astrology. Authorship The text has been attributed to the 16th century astrologer-astronomer Nilakantha by earlier sources, but later research suggests that the original Prashna-tantra was written by Samara-simha in the 13th century…

Why does Prashna Tantra matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Prashna Tantra?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Prashna Tantra.